For a couple of years they have been making the Elide Fire Extinguishing Ball which acts likes a hand grenade to put out fires.

As descibed in “Uniform Stories” on the web

This unique device acts just like a grenade, but instead of a fiery explosion, its explosion extinguishes fires! All you need is a good aim, and once the thrown Elide Fire Ball comes in contact with fire, it will self-activate. Move over fire hose, this may just be a firefighter’s new favorite toy.